Re: 2.6.27.5 RT patch status (26rt11)

[Arnaldo Carvalho de Melo <acme@redhat.com>]

Em Thu, Nov 20, 2008 at 11:25:44AM -0200, Arnaldo Carvalho de Melo escreveu:
> Em Mon, Nov 10, 2008 at 06:47:40PM -0500, Paul Gortmaker escreveu:
> > I've updated from the 2.6.27-rc8 patch series based on 26rt9 to be
> > based on 2.6.27.5 kernel.org and 26rt11 preempt_rt.
> > 
> > I've done a successful boot to X11 on basic old P4 and it survived a
> > make -j20 of kernel.org git.  There is still work to be done in order to
> > stabilize more complex hardware (e.g. SMP etc) -- but I see this still
> 
> I hit one, DELL PE1900, dual dual core xeon, megasas disk controler,
> bnx2 NIC:
> No AGP bridge found
> PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
> Placing software IO TLB between 0x20000000 - 0x24000000
> Memory: 4009156k/4980736k available (2784k kernel code, 184412k
> reserved, 1650k data, 496k init)
> Calibrating delay loop (skipped), value calculated using timer
> frequency.. 3989.96 BogoMIPS (lpj=1994981)
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
> IP: [<ffffffff8151d8b8>] fork_init+0xba/0xd2 PGD 0 
> Oops: 0000 [1] PREEMPT SMP 
> CPU 0 
> Modules linked in:
> Pid: 0, comm: swapper Not tainted 2.6.27.5-26rt11 #1
> RIP: 0010:[<ffffffff8151d8b8>]  [<ffffffff8151d8b8>] fork_init+0xba/0xd2
> RSP: 0018:ffffffff814fff08  EFLAGS: 00010206
> RAX: ffffffff8157caf0 RBX: 0000000000130000 RCX: 0000000000000048
> RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffffffff815cfc48
> RBP: ffffffff814fff18 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000010 R11: 0000000000000002 R12: 4ec4ec4ec4ec4ec5
> R13: ffffffff81535d80 R14: ffffffff815381c0 R15: 0000000000000000
> FS:  0000000000000000(0000) GS:ffffffff814eb100(0000)
> knlGS:0000000000000000
> CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> CR2: 0000000000000008 CR3: 0000000000201000 CR4: 00000000000006a0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process swapper (pid: 0, threadinfo ffffffff814fe000, task ffffffff814064a0)
> Stack:  ffffffff814fff18 0000000000000000 ffffffff814fff58
> ffffffff81506cf6
>  ffffffff814fff58 ffffffff815381c0 0000000000854520 ffffffff81506140
>  0000000000093390 0000000000000000 ffffffff814fff78 ffffffff815062a3
> Call Trace:
>  [<ffffffff81506cf6>] start_kernel+0x34c/0x3d1
>  [<ffffffff81506140>] ? early_idt_handler+0x0/0x72
>  [<ffffffff815062a3>] x86_64_start_reservations+0xa9/0xad
>  [<ffffffff815063c5>] x86_64_start_kernel+0xfb/0x106
> 
> 
> Code: 48 89 90 e0 02 00 00 48 8b 90 98 02 00 00 48 89 90 e8 02 00 00 48
> 8b 15 9f da fc ff 48 c7 c0 f0 ca 57 81 48 8b 14 0a 48 83 c1 08 <48> 03
> 42 08 48 81 f9 00 02 00 00 48 89 00 48 89 40 08 75 d6 5b 
> RIP  [<ffffffff8151d8b8>] fork_init+0xba/0xd2
>  RSP <ffffffff814fff08>
> CR2: 0000000000000008
> ---[ end trace 4eaa2a86a8e2da22 ]---
> Kernel panic - not syncing: Attempted to kill the idle task!
> Pid: 0, comm: swapper Tainted: G      D   2.6.27.5-26rt11 #1
> 
> Call Trace:
>  [<ffffffff8103c1fb>] panic+0xaf/0x167
>  [<ffffffff811a25c4>] ? account+0xd8/0xe7
>  [<ffffffff8100c95a>] ? retint_restore_args+0x13/0x20
>  [<ffffffff81054606>] ? blocking_notifier_call_chain+0xf/0x11
>  [<ffffffff8103f28d>] do_exit+0x78/0x88e
>  [<ffffffff811a2775>] ? get_random_bytes+0x1b/0x1d
>  [<ffffffff812b1a8d>] oops_begin+0x0/0x7c
>  [<ffffffff812b3f98>] do_page_fault+0x9e5/0xaa8

kernel config

http://oops.ghostprotocols.net:81/acme/v2.6.27.5-26rt11.config

- Arnaldo